Thanks for your response. I did a search under M119 oil filter and found it (had done using 400e instead before). Unfortunately, although the poster seemed to have same issue as me, it does not appear that it was ever resolved. It seems that after loosening filter top, that all the oil should drain.

Anyone out there with insight?

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2008 GL320CDI 6K
1970 280SL 112K
1982 240D 210K (Sold)
1973 220D 220K (Sold)
1967 200D 160K (Sold)
1992 400E 139K (Sold)
1988 300E 148K (Sold)
1987 300D 257K (Sold)
1991 300E 108K (Sold)
1987 300E 131K (Sold)
1978 300D TMU (Sold)
1980 300D TMU (Sold)
MBCA Member